Out-of-Bounds Affecting exim4 package, versions <4.90.1-1
Snyk CVSS
Attack Complexity
Low
Confidentiality
High
Integrity
High
Availability
High
Threat Intelligence
Exploit Maturity
Mature
EPSS
96.76% (100th
percentile)
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Test your applications- Snyk ID SNYK-DEBIAN10-EXIM4-382872
- published 8 Feb 2018
- disclosed 8 Feb 2018
Introduced: 8 Feb 2018
CVE-2018-6789 Open this link in a new tabHow to fix?
Upgrade Debian:10
exim4
to version 4.90.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream exim4
package and not the exim4
package as distributed by Debian
.
See How to fix?
for Debian:10
relevant fixed versions and status.
An issue was discovered in the base64d function in the SMTP listener in Exim before 4.90.1. By sending a handcrafted message, a buffer overflow may happen. This can be used to execute code remotely.
References
- https://security-tracker.debian.org/tracker/CVE-2018-6789
- https://exim.org/static/doc/security/CVE-2018-6789.txt
- https://git.exim.org/exim.git/commit/cf3cd306062a08969c41a1cdd32c6855f1abecf1
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-6789
- https://www.debian.org/security/2018/dsa-4110
- https://lists.debian.org/debian-lts-announce/2018/02/msg00009.html
- https://www.exploit-db.com/exploits/44571/
- https://www.exploit-db.com/exploits/45671/
- http://packetstormsecurity.com/files/162959/Exim-base64d-Buffer-Overflow.html
- https://devco.re/blog/2018/03/06/exim-off-by-one-RCE-exploiting-CVE-2018-6789-en/
- http://openwall.com/lists/oss-security/2018/02/10/2
- http://www.openwall.com/lists/oss-security/2018/02/07/2
- http://www.securityfocus.com/bid/103049
- http://www.securitytracker.com/id/1040461
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2018-6789
- https://usn.ubuntu.com/3565-1/
- https://www.exploit-db.com/exploits/45671
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog